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 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

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package com.sun.org.apache.xerces.internal.util;

import com.sun.org.apache.xerces.internal.impl.xs.util.SimpleLocator;

import com.sun.org.apache.xerces.internal.jaxp.validation.WrappedSAXException;

import com.sun.org.apache.xerces.internal.xni.QName;

import com.sun.org.apache.xerces.internal.xni.XMLAttributes;

import com.sun.org.apache.xerces.internal.xni.XMLDocumentHandler;

import com.sun.org.apache.xerces.internal.xni.XMLLocator;

import com.sun.org.apache.xerces.internal.xni.XMLString;

import com.sun.org.apache.xerces.internal.xni.parser.XMLDocumentSource;

import org.xml.sax.Attributes;

import org.xml.sax.ContentHandler;

import org.xml.sax.Locator;

import org.xml.sax.SAXException;

/**

 * Receves SAX {@link ContentHandler} events

 * and produces the equivalent {@link XMLDocumentHandler} events.

 *

 * @author

 *     Kohsuke Kawaguchi

 */

public class SAX2XNI implements ContentHandler, XMLDocumentSource {

    public SAX2XNI( XMLDocumentHandler core ) {

        this.fCore = core;

    }

    private XMLDocumentHandler fCore;

    private final NamespaceSupport nsContext = new NamespaceSupport();

    private final SymbolTable symbolTable = new SymbolTable();

    public void setDocumentHandler(XMLDocumentHandler handler) {

        fCore = handler;

    }

    public XMLDocumentHandler getDocumentHandler() {

        return fCore;

    }

    //

    //

    // ContentHandler implementation

    //

    //

    public void startDocument() throws SAXException {

        try {

            nsContext.reset();

            XMLLocator xmlLocator;

            if(locator==null)

                // some SAX source doesn't provide a locator,

                // in which case we assume no line information is available

                // and use a dummy locator. With this, downstream components

                // can always assume that they will get a non-null Locator.

                xmlLocator=new SimpleLocator(null,null,-1,-1);

            else

                xmlLocator=new LocatorWrapper(locator);

            fCore.startDocument(

                    xmlLocator,

                    null,

                    nsContext,

                    null);

        } catch( WrappedSAXException e ) {

            throw e.exception;

        }

    }

    public void endDocument() throws SAXException {

        try {

            fCore.endDocument(null);

        } catch( WrappedSAXException e ) {

            throw e.exception;

        }

    }

    public void startElement( String uri, String local, String qname, Attributes att ) throws SAXException {

        try {

            fCore.startElement(createQName(uri,local,qname),createAttributes(att),null);

        } catch( WrappedSAXException e ) {

            throw e.exception;

        }

    }

    public void endElement( String uri, String local, String qname ) throws SAXException {

        try {

            fCore.endElement(createQName(uri,local,qname),null);

        } catch( WrappedSAXException e ) {

            throw e.exception;

        }

    }

    public void characters( char[] buf, int offset, int len ) throws SAXException {

        try {

            fCore.characters(new XMLString(buf,offset,len),null);

        } catch( WrappedSAXException e ) {

            throw e.exception;

        }

    }

    public void ignorableWhitespace( char[] buf, int offset, int len ) throws SAXException {

        try {

            fCore.ignorableWhitespace(new XMLString(buf,offset,len),null);

        } catch( WrappedSAXException e ) {

            throw e.exception;

        }

    }

    public void startPrefixMapping( String prefix, String uri ) {

        nsContext.pushContext();

        nsContext.declarePrefix(prefix,uri);

    }

    public void endPrefixMapping( String prefix ) {

        nsContext.popContext();

    }

    public void processingInstruction( String target, String data ) throws SAXException {

        try {

            fCore.processingInstruction(

                    symbolize(target),createXMLString(data),null);

        } catch( WrappedSAXException e ) {

            throw e.exception;

        }

    }

    public void skippedEntity( String name ) {

    }

    private Locator locator;

    public void setDocumentLocator( Locator _loc ) {

        this.locator = _loc;

    }

    /** Creates a QName object. */

    private QName createQName(String uri, String local, String raw) {

        int idx = raw.indexOf(':');

        if( local.length()==0 ) {

            // if naemspace processing is turned off, local could be "".

            // in that case, treat everything to be in the no namespace.

            uri = "";

            if(idx<0)

                local = raw;

            else

                local = raw.substring(idx+1);

        }

        String prefix;

        if (idx < 0)

            prefix = null;

        else

            prefix = raw.substring(0, idx);

        if (uri != null && uri.length() == 0)

            uri = null; // XNI uses null whereas SAX uses the empty string

        return new QName(symbolize(prefix), symbolize(local), symbolize(raw), symbolize(uri));

    }

    /** Symbolizes the specified string. */

    private String symbolize(String s) {

        if (s == null)

            return null;

        else

            return symbolTable.addSymbol(s);

    }

    private XMLString createXMLString(String str) {

        // with my patch

        // return new XMLString(str);

        // for now

        return new XMLString(str.toCharArray(), 0, str.length());

    }

    /** only one instance of XMLAttributes is used. */

    private final XMLAttributes xa = new XMLAttributesImpl();

    /** Creates an XMLAttributes object. */

    private XMLAttributes createAttributes(Attributes att) {

        xa.removeAllAttributes();

        int len = att.getLength();

        for (int i = 0; i < len; i++)

            xa.addAttribute(

                    createQName(att.getURI(i), att.getLocalName(i), att.getQName(i)),

                    att.getType(i),

                    att.getValue(i));

        return xa;

    }

}